t^2-t=.20

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Solution for t^2-t=.20 equation:


Simplifying
t2 + -1t = 0.20

Reorder the terms:
-1t + t2 = 0.20

Solving
-1t + t2 = 0.20

Solving for variable 't'.

Reorder the terms:
-0.20 + -1t + t2 = 0.20 + -0.20

Combine like terms: 0.20 + -0.20 = 0.00
-0.20 + -1t + t2 = 0.00

Begin completing the square.

Move the constant term to the right:

Add '0.20' to each side of the equation.
-0.20 + -1t + 0.20 + t2 = 0.00 + 0.20

Reorder the terms:
-0.20 + 0.20 + -1t + t2 = 0.00 + 0.20

Combine like terms: -0.20 + 0.20 = 0.00
0.00 + -1t + t2 = 0.00 + 0.20
-1t + t2 = 0.00 + 0.20

Combine like terms: 0.00 + 0.20 = 0.2
-1t + t2 = 0.2

The t term is -1t.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1t + 0.25 + t2 = 0.2 + 0.25

Reorder the terms:
0.25 + -1t + t2 = 0.2 + 0.25

Combine like terms: 0.2 + 0.25 = 0.45
0.25 + -1t + t2 = 0.45

Factor a perfect square on the left side:
(t + -0.5)(t + -0.5) = 0.45

Calculate the square root of the right side: 0.670820393

Break this problem into two subproblems by setting 
(t + -0.5) equal to 0.670820393 and -0.670820393.

Subproblem 1

t + -0.5 = 0.670820393 Simplifying t + -0.5 = 0.670820393 Reorder the terms: -0.5 + t = 0.670820393 Solving -0.5 + t = 0.670820393 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + t = 0.670820393 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + t = 0.670820393 + 0.5 t = 0.670820393 + 0.5 Combine like terms: 0.670820393 + 0.5 = 1.170820393 t = 1.170820393 Simplifying t = 1.170820393

Subproblem 2

t + -0.5 = -0.670820393 Simplifying t + -0.5 = -0.670820393 Reorder the terms: -0.5 + t = -0.670820393 Solving -0.5 + t = -0.670820393 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + t = -0.670820393 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + t = -0.670820393 + 0.5 t = -0.670820393 + 0.5 Combine like terms: -0.670820393 + 0.5 = -0.170820393 t = -0.170820393 Simplifying t = -0.170820393

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.170820393, -0.170820393}

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